How to Tell a Fake IW323722 From a Genuine IWC Aquatimer

A fake IW323722 usually fails in four places: the anti-reflective coating on the crystal, the date wheel font, the depth of the caseback engraving, and the finish on the movement. At arm's length a high-grade replica looks correct. Under a loupe, on a timegrapher, or with calipers in hand, the gaps repeat from one counterfeit to the next.

The IW323722 is an IWC Aquatimer dive reference, so the tells follow the pattern used across that line: a sapphire crystal coated on both faces, applied indices with even lume fill, a signed screw-down crown, and an IWC-finished automatic movement. Replicas copy the outside and cut corners on everything inward.

What to Have Ready

  • A 10x loupe
  • Digital calipers
  • A timegrapher or a phone timing app
  • Reference photos of a verified example, taken straight on
  • A bright, angled light source for reading engraving

Check the Case and Crystal First

  1. Measure the case diameter, thickness, and lug width with calipers, then compare each number to the specification IWC publishes for the reference. Replica cases commonly run a fraction of a millimeter off.
  2. Tilt the watch toward a light source and look at the crystal. A genuine crystal carries anti-reflective coating on both faces, so reflections stay muted and carry a faint blue or violet tint. Most fakes have coating on one side only and flare white under direct light.
  3. Run a fingernail along the case flanks and lug edges. Genuine brushing is uniform in one direction, and the polished bevels stay crisp where they meet it.
  4. Unscrew and reseat the crown several times. Thread engagement should feel smooth and stop cleanly. Loose or gritty threads are a common replica fault.

Inspect the Dial, Hands, and Date

  1. Study the applied indices under the loupe. Lume should fill each marker to the same level with no overflow onto the metal.
  2. Look at the date window. Check the numeral shape, the centering inside the aperture, and the magnification from the cyclops, if fitted.
  3. Measure hand length against the chapter ring. Replica hands are often a touch short or sit too far above the dial.
  4. Read the dial text with the loupe. Print should be sharp at the edges with even spacing between the lines.

Check the Caseback and Movement

  1. Shine the light across the caseback at a low angle. Genuine engraving cuts deep with square shoulders; replica engraving looks shallow and rounded.
  2. Compare the reference and serial numerals to reference photos. Font weight and spacing are the giveaway, not the characters themselves.
  3. Open the caseback or use a display back to see the movement. A genuine IWC 30110, based on the ETA 2892-A2, shows 21 jewels, runs at 28,800 vibrations per hour, and carries an IWC-decorated rotor with defined bevels and Geneva stripes.
  4. Set the watch on a timegrapher and record rate, amplitude, and beat error in several positions. A fake usually shows weak amplitude or unstable rates across positions.

Look at the Bracelet or Strap

  1. Examine the clasp or tang buckle engraving. Logos on replicas are stamped thin and often sit off center.
  2. Check bracelet link fit and end-link seating against the case. Gaps and rattle show up on counterfeits even when the case looks right.
  3. On rubber straps, check the texture and signing on the keeper. Replica rubber feels slick and carries a strong chemical smell.

Why the Movement Settles It

Case and dial differences can be argued about. Movement differences cannot. A genuine IW323722 can be serviced, regulated, and documented by IWC or an authorized watchmaker, and its parts carry the finish expected of the manufacture. A counterfeit cannot be serviced through official channels, has no valid warranty, and loses accuracy over time because the movement underneath was built to a price. If a seller avoids a service center or hides the movement, treat that as an answer in itself.